Max-Q is a key event during launch, and dynamic pressure is closely monitored so they know when a max is hit.
But how exactly do they know when Q hits a max? If you track the rate at which Q is changing, then as that rate drops to zero, you can say you're approach your max---and once you hit zero, you can say "max-Q."
But dynamic pressure data is noisy, and you'll see minute troughs and crests in it which would cause you to incorrectly say "we're approaching a max" and "we've hit a max."
So to use your noisy Q data, you'll have to first remove the high-frequency noise, so the resulting signal is smooth and free of spurious crests and peaks. The only meaningful peak then would be your max Q.
But is this how it's done?